Nozzle on heat-treatment machines for textile fabrics and the like



Oct. 3, 1961 Filed July 27, 1959 G. MQHRING NOZZLE ON HEAT-TREATMENTMACHINES FOR TEXTILE FABRICS AND THE LIKE 2 Sheets-Sheet 1 GustavINVENTOR. Jfb/Z r1 ng Oct. 3, 1961 G. MOHRING 3,002,700

NOZZLE 0N HEAT-TREATMENT MACHINES FOR TEXTILE FABRICS AND THE LIKE FiledJuly 27, 1959 2 Sheets-Sheet 2 flqi IN VEN TOR.

Gustav [16}? ring llnited States Patent 3,002,700 NOZZLE NHEAT-TREATMENT MACHINES FOR TEXTILE FABRICS AND THE LIKE GustavMiihring, 3 Salzmannweg, Stuttgart, Germany Filed July 27, 1959, Ser.No. 829,728 Claims priority, application Germany July 26, 1958 7 Claims.(Cl. 239-455) The invention relates to a nozzle for the treatment ofWebs in heat-treatment machines for textile fabrics, foils or the likeas it is, for example, installed in drying Inachines.

Nozzles of this known type are provided with a discharge slot ofdefinite width which extends across the whole width of the web to betreated.

Nozzles are also known the slot width of which can be regulated byadjusting the walls forming the slot. The

slot of these known nozzles has a constant width over the whole lengthof the nozzle.

When treating fabrics which tend to strong sagging, a uniform treatmentof the web by means of these nozzles is not possible, all the more sincein practical use, on account of differing conditions of flow andpressure in the nozzles, a uniform discharge of the treating medium isvery difiicult to obtain. Even presupposing that a uniform stream of airis discharged from the nozzles, a uniform heat-treatment of the Webwould be questionable on account of the fabric web yielding to a certainamount of sagging and thereby being moved past the treatment nozzles atdiiferent distances. This fact renders a uniform heat-treatment of suchfabrics extremely difi'icult.

Fabric webs which are not supported laterally by. chains but fed throughthe drying machine in suspense are liable to cover intermittently thenozzle slots more or less. When employing the known nozzles the uniformtreatment and consequently the uniform transport is considerablydisturbed.

It results therefrom that the quantities of heat and air beingdischarged from the nozzles must be precisely controlled and keptuniform in their effect. These requirements have as yet not been metwith by the nozzle constructions hitherto used.

It is the object of the present invention to eliminate thesedisadvantages and to provide a nozzle with a mouth adjustable by meansof adjusting elements such as screws, eccentrics, cams, Wedges or thelike so that the cross section thereof can be adjusted to any desiredwidth at dilferent points of the nozzle.

According to another feature of the invention the nozzle mouth isprovided with one or several spacer means projecting beyond the nozzlemouth in the transverse plane thereof and extendingpreferably throughthe entire length of the nozzle. These spacer means serve the purpose ofkeeping the nozzle mouth clear for the passage of the treating mediumwhen the fabric web sags or even on the nozzle month. At the same timethese spacer means serve to regulate the quantity of air or heat beingdischarged.

The mouth of the nozzle according to the invention is prevented frombeing closed by the spacer means so that the treating medium unifluencedby the respective distance of the fabric from the nozzle mouth can bedischarged with the desired intensity. The novel nozzle permits a fabricweb to be treated in a simple manner by exactly controlled gaseous orvaporous media so that optimum operating condtions in the machine areobtained.

The spacer means arranged according to still another feature of theinvention as an elongated member has a steadying effect upon the run ofthe webs, especially when the latter are not guided at the edges byholding devices but are transported in suspense.

ice

The desired variation of the cross section of the nozzle mouth can alsobe obtained by varying the cross section of the spacer means. This can,for instance, be accomplished by adjustably arranging the spacer means.The cross section of the spacer means may thus be equally or unequallyvaried and correspondingly influences in turn the discharge width of thenozzle mouth.

Several preferred embodiments of the invention are illustrated by way ofexample in the accompanying drawings, in which is:

FIG. 1 a cross section through a nozzle with spacer means arrangedtherein;

FIG. 2 a view similar to FIG. 1 but showing, on a reduced scale, anotherform of construction of the nozzle and the spacer means;

FIG. 3 a similar view through a further form of construction;

FIG. 4 a top plan view of the nozzle according to FIG. 3;

FIG. 5 a top plan view .of the nozzle according to FIG. 1;

FIG. 6 a top plan view of the nozzle according to FIG. 2;

FIG. 7 an arrangement of several nozzles according to FIGS. 1 and 5, and

FIGS. 8 an arrangement of nozzles according to FIGS. 3 and 4.

FIG. 1 shows a nozzle mouth 1 formed by two side walls 2. Anintermediate member 3 is mounted in said nozzle mouth 1 and extendsthrough the whole length of the nozzle so that two nozzle slots 12 areformed. The

intermediate member 3 which preferably consists of sheet metal in theform of a hollow body is provided with two projections 4 extendingbeyond the nozzle mouth 1 in the transverse plane thereof andconstituting spacer means for a fabric web B running past the nozzle. Inorder to be able to optionally adjust the width of each slot 12. theintermediate member 3 has its free longitudinal edge portions 8releasably clamped between two superposed longitudinal rails 6 and 7held together by a plurality of screws 5. Upon releasing the screws 5the longitudinal edge portions 8 are allowed to be brought into anydesired position and then clamped again so that different slot widths,for example a or b are possible. The Width of each slot 12 can in thismanner be adjusted in itself to different sizes, for example growingfrom left to right, as is shown in FIG. 5.

In the modified embodiment shown in FIG. 2 a hollow intermediate member3 of oval cross section is employed which likewise projects beyond thenozzle mouth in the transverse plane thereof by a predetermined amountand leaves two slots 12. The adjustment of the slot widths isaccomplished by means of several screw bolts 9 extending transverselythrough the nozzle mouth 1 and the hollow intermediate member 3 and byappertaining nuts 10 screwed on the bolts 9 from outside the walls 2 ofthe nozzle mouth 1. This arangement, too, allows any desired adjustmentof the nozzle slots to be accomplished.

As shown in FIG. 3, a special intermediate member can be dispensed with.In this particularly simple form of construction one of the two sidewalls is constructed in the same manner as described with reference toFIGS. 1 and 2, whereas the other side wall, indicated at 11, is somewhathigher so asto project beyond the side wall 2 by a predetermined amount,thus serving as spacer means. If in this type of construction the web offabric B lies on the spacer, i.e. on the side wall 11, the treatingmedium can naturally be blown out from the nozzle to one side only. Inorder to prevent disadvantages likely to result therefrom, the sidewalls 11 serving as spacer means of nozzles arranged one behind theother are alternately arranged on the left and on the right, as isdiagrammatically shown in FIG. 8. In this connection it should bementioned that it is not necessary to have each nozzle adjustedindividually. Adjusting means such as eccentrics, screw spindles or thelike may be arranged in such a manner that a number of nozzles can besimultaneously adjusted while the machine is running.

Finally, it may be said, that the nozzle according to the invention notonly allows the nozzle slots to be adjusted to any desired widths andconfigurations but also the distance between the nozzle and the web offabric to be clearly determined. Moreover, the invention renderspossible a vast adaptation to given conditions so as to provide optimumworking conditions in the respective treatment machine.

The invention may be embodied in other specific forms without departingfrom the spirit or essential characteristics thereof. The presentembodiments are therefore to be considered in all respects asillustrative and not restrictive, the scope of the invention beingindicated by the appended claims rather than by the foregoingdescription and all changes which come within the meaning and range ofequivalency of the claims are therefore intended to be embraced therein.

I claim:

1. A nozzle for distributing a heat treating fluid to uniformlyheat-treat a continuous web of textile material or the like comprisingmeans forming an elongated discharge slot terminating in a predeterminedplane for directing pressurized treating fluid which is discharged as aconcentrated jet in the direction of the middle axis of the nozzlecross-section, perpendicularly to the web of fabric in spaced relationto a predetermined path of travel, and transverse adjusting means spacedlongitudinally of said slot and providing a variable width along saiddischarge slot for attaining different velocity flow of fluid along saidslot, said nozzle including spacer means extending longitudinally ofsaid slot and beyond said predetermined plane for maintaining saidcontinuous web a minimum distance from said slot discharge.

2. The structure of claim 1, wherein the spacer means is constructed forsubstantially only a line contact with the web of the fabric.

3. The structure of claim 1, wherein the spacer means projects adistance outwardly of the discharge slot sufficient to preclude contactof a sagging web of the fabric with the walls of the slot.

4. The structure of claim 1; said spacer means comprising anintermediate member extending longitudinally of said slot andterminating in an edge disposed beyond said predetermined plane, saidintermediate member forming a pair of variable width slots on oppositesides of said intermediate member.

5. The structure of claim 4; said intermediate member being transverselydeformable and having a variable crosssection for varying the effectivewidth of said pair of slots longitudinally of said nozzle.

6. The structure of claim 4; said intermediate member comprising ahollow body including a pair of longitudinal projections defining oneside of said slots and projecting beyond said predetermined plane, and aclamp member disposed longitudinally of said slot below saidprojections, said hollow member including transversely displaceable edgeportions adjustably received in said clamp member.

7. The structure of claim 1, wherein said means forming said elongateddischarge slot includes a pair of spaced longitudinally directed sidewalls, and wherein the edge of one of said side walls projects beyondsaid predetermined plane to form said spacer means.

References Cited in the file of this patent UNITED STATES PATENTS163,934 Leseur June 1, 1875 1,327,452 Williams Jan. 6, 1920 1,627,250Parker May 3, 1927 2,029,337 Parker Feb. 4, 1936 2,232,573 Teves Feb.18, 1941 2,588,312 Walker Mar. 4, 1952 2,609,240 Faulkner Sept. 2, 19522,625,008 Crook Jan. 13, 1953 2,778,683 Gillis Jan. 22, 1957 2,788,635'Ford Apr. 16, 1957

